US Bridges

State Route 178 EB over Elizabeth Norris Road

Good

Kern County, California · 06-KER-178-R41.64 · Structure no. 50 0341R

Built
1974
51 years old
Condition
Good
inspected December 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
95 ft
1 main span
Daily traffic
2,100
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 178 EB over Elizabeth Norris Road is a prestressed concrete box beam or girders - multiple carrying State Route 178 EB over Elizabeth Norris Road in Kern County, California. It was built in 1974, so it is 51 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,100 vehicles a day, roughly 8% of them trucks, projected to reach 4,319 by 2044. The structure is 95 ft (29 m) long and 41 ft wide. If it were closed, the detour would be 37.9 mi (61 km).

CarriesState Route 178 EB
CrossesElizabeth Norris Road
Location06-KER-178-R41.64
RouteState Highway 178
Coordinates35.61154, -118.48949
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.4 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length95 ft (29 m)
Longest span93 ft (28.3 m)
Deck width41 ft (12.5 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,100 (2009)
Projected traffic4,319 by 2044
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed37.9 mi (61 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 178 EB over Elizabeth Norris Road built?

It was built in 1974, making it 51 years old in 2025.

What condition is State Route 178 EB over Elizabeth Norris Road in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2022.

How much traffic does State Route 178 EB over Elizabeth Norris Road carry?

About 2,100 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is State Route 178 EB over Elizabeth Norris Road?

The structure is 95 ft (29 m) long with a longest span of 93 ft (28.3 m) and a deck 41 ft wide.

Who owns State Route 178 EB over Elizabeth Norris Road?

It is owned by the State Highway Agency.